diff options
| author | Stephen Warren | 2012-04-17 20:43:34 +0200 |
|---|---|---|
| committer | Wolfram Sang | 2012-05-12 14:28:17 +0200 |
| commit | 0938643e533cc80ef0cdfdd2e260c4910d0f8bc7 (patch) | |
| tree | 7c31d3251861eed8e799b73712e9bc006a9e6804 | |
| parent | i2c: implement i2c_verify_adapter (diff) | |
| download | kernel-qcow2-linux-0938643e533cc80ef0cdfdd2e260c4910d0f8bc7.tar.gz kernel-qcow2-linux-0938643e533cc80ef0cdfdd2e260c4910d0f8bc7.tar.xz kernel-qcow2-linux-0938643e533cc80ef0cdfdd2e260c4910d0f8bc7.zip | |
of/i2c: implement of_find_i2c_adapter_by_node
This finds the struct i2c_adapter * for a given device tree node. Just
like of_find_i2c_device_by_node.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
| -rw-r--r-- | drivers/of/of_i2c.c | 14 | ||||
| -rw-r--r-- | include/linux/of_i2c.h | 4 |
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c index 068488717f69..1e173f357674 100644 --- a/drivers/of/of_i2c.c +++ b/drivers/of/of_i2c.c @@ -94,4 +94,18 @@ struct i2c_client *of_find_i2c_device_by_node(struct device_node *node) } EXPORT_SYMBOL(of_find_i2c_device_by_node); +/* must call put_device() when done with returned i2c_adapter device */ +struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node) +{ + struct device *dev; + + dev = bus_find_device(&i2c_bus_type, NULL, node, + of_dev_node_match); + if (!dev) + return NULL; + + return i2c_verify_adapter(dev); +} +EXPORT_SYMBOL(of_find_i2c_adapter_by_node); + MODULE_LICENSE("GPL"); diff --git a/include/linux/of_i2c.h b/include/linux/of_i2c.h index 0efe8d465f55..1cb775f8e663 100644 --- a/include/linux/of_i2c.h +++ b/include/linux/of_i2c.h @@ -20,6 +20,10 @@ extern void of_i2c_register_devices(struct i2c_adapter *adap); /* must call put_device() when done with returned i2c_client device */ extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node); +/* must call put_device() when done with returned i2c_adapter device */ +extern struct i2c_adapter *of_find_i2c_adapter_by_node( + struct device_node *node); + #else static inline void of_i2c_register_devices(struct i2c_adapter *adap) { |